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UL1666ISBN0-7629-1291-XTestforFlamePropagationHeightofElectricalandOptical-FiberCablesInstalledVerticallyinShaftsUL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY16,2007−UL1666tr1UnderwritersLaboratoriesInc.(UL)333PfingstenRoadNorthbrook,IL60062-2096ULStandardforSafetyforTestforFlamePropagationHeightofElectricalandOptical-FiberCablesInstalledVerticallyinShafts,UL1666FifthEdition,DatedFebruary16,2007SummaryofTopicsTheFifthEditionoftheStandardforTestforFlamePropagationHeightofElectricalandOptical-FiberCablesInstalledVerticallyinShafts,UL1666,hasbeenissuedtoreflectthelatestANSIapprovaldateandtoincorporateformattingandeditorialrevisionssuchasrenumbering,pagination,requirementsaresubstantiallyinaccordancewithUL’sProposal(s)onthissubjectdatedDecember8,catedonthetitlepage(page1),ionisdirectedtothenoteonthetitlepageofthisStandardoutliningtheprocedurestobefollowedtoretaintheapprovedtextofthisANSI/ormationconcerningtheuseandapplicationoftherequirementscontainedinthisStandard,thecurrentversionoftheULForewordislocatedonULStandardsInfoNetat:/emasterforthisStandardatUL’sNorthbrookOfficeistheofficialdocumentinsofarasitrelatestoaULserviceandthecomplianceofaproductwithrespecttotherequirementsforthatproductandservice,’raprintedcopyofaStandard,northedistributiondisketteforaStandard-on-DisketteandthefilL’sStandardsandallcopyrights,ownerships,andrightsreofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformbyanymeans,electronic,mechanicalphotocopying,recording,ndardforSafidesthisStandard″asis″withoutwarrantyofanykind,eitherexpressedorimplied,includingbutnotlimitedto,theimpliedwarrantiesofmerchantabilityorfientwillULbeliableforanyspecial,incidental,consequential,indirectorsimilardamages,includinglossofprofits,lostsavings,lossofdata,oranyotherdamagesarisingoutoftheuseofortheinabilitytousethisStandard,evenifULoranauthoentshallUL’sliabilityforanydamageeverexceedthepricepaidforthisStandard, 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COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY16,20071UL1666StandardforTestforFlamePropagationHeightofElectricalandOptical-FiberCablesInstalledVerticallyinShaftsFirstEdition–November,1986SecondEdition–January,1991ThirdEdition–February,1997FourthEdition–November,2000FifthEditionFebruary16,2007ThemostrecentdesignationofANSI/UL1666asanAmericanNationalStandard(ANSI)occurredonFebruary8,IapprovaldoesnotincludetheCoverPage,TransmittalPages,SI/ULStandardforSafety,whichconsistsofthefifthedition,isundercontinuousmaintenance,ctivedateincludedasanoteimmediatelyfollowingconsofthisStandardwilndardiscurrentonlyifitincorporatesthemostrecentlyadoptedrevisions,allofwhichareitemizedonthetrtsorproposaalsshouldbesubmittedviaaProposalRequestinUL’sOn-LineCollaborativeStandardsDevelopmentSystem(CSDS)at0-7629-1291-XCOPYRIGHT©1986,/UL1666-2007UL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2UL1666FEBRUARY16,2007NoTextonThisPageUL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ..84.6Temperatureandfl..13UL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL4UL1666FEBRUARY16,2007INTRODUCTION1Scope1.1Thisisafiretestfordeterminingvaluesofflamepropagationheightforelectricalandoptical-fibercablesthatareforinstallationverticallyinshaftsorinverticalrunsthatpenetratemorethanonefloor.1.2Thepurposeofthistestistodeterminewhethertheflamepropagationcharacteristicsofthese″riser″cablesareinaccordancewiththeNationalElectricalCode.1.3Thistestdoesnotinvestigatethetoxicityorcorrosivityoftheproductsofcombustionordecomposition.1.4Thistestdoesnotcovertheconstructionrequirementsforanycableortheelectrical,optical,MANCE3FireTestRoom3.1Thefiretestroominwhichthechamberislocatedistohaveprovisionforafreeinflowofairtomaintaintheroomatacontrolledpressureof0–0.05in(0–12Pa)ofwatercolumnwithrespecttobarometricpressureandatatemperatureof73±5°F(23±3°C)andarelativehumidityof50±tchamber,allequipment,andthecablespecimensaretobeprotectedfromlsofthestructurearetobeofstandardconcretemasonrynominally8in(203mm)firstandsecondfloorsshallbeconstructedofreinforcednormal-weightconcretenominally5–8in(127–203mm)fshallbeconstructedofasuitablebuildingconeasuring1ftby2ft(305mmby610mm)istobelocatedinthefirstfloor,andanidenticalslotistobelocateddirectlyaboveinthesecondflninFigure4.1,eachslotistobe8in(203mm)fromthebackwalloftheroomand4in(102mm)tsaretobeorientedadjacenttoeithersidewalloftheroombasedoninstallationandpositionofthefi COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY16,2007UL166654.1.2Thetestchamberistocontainsteelaccessdoorslocatedonthefirstandsecondfloningthesecondfloordoororanadditionalaccesshatchinthewalloppositetheslotisadvantageousasthisallowsforeaseofinstallationofthecablespecimensandpositioningofsecondfleofeachaccessisnotspecifiesofthedoorframesaretouseaninorganicgasketingmaterialtoensureatightfi4.1Firetestchamber4.2Burnerapparatus4.2.1Theburneristoconsistof1/2-insteelpipewitha1/2-inpipeelbow,tronic-sparkigniteristobepositionedadjacenttotheoutletofthegas-pipingoutletforignitionofthepilotflame.4.2.2Apropane-gasflowmeteristobeinstalledinthepipingfeedingtheburnerformeasuringtheflflowmeteristobecapableofmeasuringagasflowrateof222SCFH(standardcubicfeetperhour)(1743cm3/s). COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6UL1666FEBRUARY16,2007Figure4.2BurnerdiffusionplateUL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY16,2007UL16667Figure4.3LocationofignitionburnerrelativetofloorslotandcablesUL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL8UL1666FEBRUARY16,20074.3Burnerfan4.3.1Anelectricblowerfancapableofprovidinganairvelocityacrosstheburneroutletasspecifiedin8.3istobepositionedoutsidethhatis6inwideby4inhigh(152mmby102mm)istobeprovidedinthewallofthetestchamberatthefirstfloorleveltoenablethefantomoveairacrosstheburner.4.4Propane4.4.1ThegassuppliedtotheburneristobeCP-gradepropanehavinganominalheatingvalueof2500Btu(thermochemical)percubicfoot[93.0MJ/m3or22.2kilocalories(thermochemical)percubicmeter].4.5Exhaustblowerandduct4.5.1Asteelexhaustductistobepositionedinthecenteroftheroofofthefiweristohavethecapacitytomaintaintherequiredairvelocityspecifiedin8.2throughoutthedurationofthetest.4.6Temperatureandflowmeasurementinstrumentation4.6.1Eight28AWGTypeKthermocoupleswithaninconelsheatharetobelocatedintheslotinthesecondfloor,andonethermocoupleistobelocatedinthefirstfloorslot,asshowninFigure4.4.4.6.2One28AWGTypeKthermocouplewithaninconelsheathistobelocatedatthecenterpointofthefirstfloorchamberceilingandistoextenddownward1±1/16in(25.4±1.6mm)ermocoupleisusedtodeterminethetestchambertemperaturepriortoconductingatest.4.6.3Abi-directionalair-velocityprobeistobelocatedatthehorizontalandverticalcenter(]·[)ofthefirstflocityprobeforflowmeasurementsistobec COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULFEBRUARY16,2007UL16669Figure4.4LocationofthermocouplesinslotUL COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10UL1666FEBRUARY16,20074.7Dataacquisitionequipment4.7.1Adigitaldataacquisitionsystemshallbeusedtocollectandrecordtheairinletslotvelocityandsecondfloorslotthermocoupletemperatureatintervalsof5secondsorless.5SpecimenConditioning5.1Priortotesting,allcablespecimensaretobeconditionedforaminimumof24hinacontrolledenvironmentof73±5°F(23±3°C)andrelativehumidityof50±swhicharesuppliedonreelsshallhaveanywrappingmaterialsremovedbeforeconditioning.6DeterminationofSpecimenDiameter6.1Useeitheradiametertape,verniercaliper,oramicrometerwithanaccuracyof0.001in(0.025mm)thatthetapeiswrappedtightlyaroundthespecimen,rithmeticaverageofthreereadingsovera1ft(0.3m)lengthofthespecimenasthespecimendiameter.6.3Theverniercaliperisappropriateforallsizesofcablespecimens,andisespeciallyusefulforsmalldiametercableswhicharenotuniformincrosssection.6.4Ifthespecimenisround,closethecalipergthemeasurementaminimumoffivetimesoveralengthof1ft(0.3m)thmeticaverageofthefivereadingsisusedasthediameterofthecablespecimen.6.5Ifthespecimenisnotuniformincrosssection,withthewidthtothicknessratiolessthan2:1,takethreemeasurementsatthewidepoints,meterisanarithmeticaverageofthesixreadings.6.6Ifthewidthtothicknessratioofthespecimenisgreaterthan2:1,ethewidthofthespecimenatsixlocationsona1ft(0.3m)cimendiameterisanarithmeticaverageofthesixreadings.6.7Themfivemeasurementsofthespecimendiameterovera1ft(0.3m)thmeticaverageofthefi 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ULFEBRUARY16,2007UL1666117NumberofCableLengths7.1Thenumber(N)ofcablelengths(roundedtothenextlowerwholenumber)tobeusedinagiventestistobedeterminedbymeansofthefollowingformula,N=12/Dinwhich:forroundcables,Distheoutsidediameterofthecableininches,andfornon-roundcables,Disthelargestdimensionofthecablediameter.7.2Aguideformountingcablesisgivenin11.1–12.5.8TestProcedure8.1Priortotestingeachday,thetestchamberistobepreheatedbyactivatingtheexhaustblowerandprovidingapropaneignitionflamefor30minusingthespecificationsin8.5.8.2Afterpreheating,andwiththeexhaustflowestablished,thetemperatureinthechamberistobe100±20.0°F(38±11°C)asmeasuredbythethermocouplepositionedatthecenterpointofthefirstflomingairistobeatatemperatureof73±5°F(23±3°C)witharelativehumidityof50±lespecimensaretobeinstalledandanexhaustairflowasmeasuredattheslotinthefirstflooristobeestablishedat3.5±0.5m/s(11.5±1.6ft/s).Theairvelocityintheslotistobecalculatedasfollows:inwhich:kisaconstantforthebi-directionalprobedeterminedexperimentallybycalibratingtheprobewithastandardflow-measuringdevice,∆Pisthepressuredifference(Pascals)recordedacrossthebi-directionalprobe,andTistheairflowtemperature(K).8.3Theairvelocityalongthefloorunderthediffuserplateistobeestablishedat1.6±0.1m/s(4.8±0.3ft/s)asmeasuredhorizontallyalongtheperpendicularcenterlineoftheslotatapoint3in(76mm)infrontoftheexposedfaceofthecablespecimensand2in(51mm)abovethefl 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UL12UL1666FEBRUARY16,20078.4Twosetsofspecimensofeachcableconstructionaretobetested(see9.1concerningtestofathirdset).Eachsetistoconsistofmultiple17-1/2-ft(5.33m)lelengthsaretobeinstalledthroughbothslotsagainstthelongsidesoftheslotsthatareclosesttotheignitionfllelengthsaretobeinasinglelayerthatfillsthecenter12in(305mm)ofthelongside.8.5Thetestiflameistobelitandthepropanegasflowrateistobeincreasedto211±11SCFH(standardcubicfeetperhour)(1657±86cm3/s)tflameistoproduce527,500±25,500Btu(thermochemical)perhour(154.5±8.1kW).8.6Themaximumflamepropagationheightwithreferencetothefirst-flrmocoupletemperaturesatthe12ft,0in(3m,66cm)levelandattheair-velocityprobearetoberecordedatintervalsof5sorless.8.7Thetestflameistobeappliedtothecablespecimensfor30minunlessthenonmetalliccablepartsareattercase,thetestflase,afterthetestflameisextinguishedandanyflamingofthecablespecimensceases,tngofsootonthecablespecimensistobeignoredwheoccursanywherethatacablespecimenshowsevidenceofitscombustiblematerialhavingbeensoftened(recordedas″melt″),havingbeenpartiallyconsumed(recordedas″char″),orhavingbeencompletelyconsumed(recordedas″ash″).REQUIREMENTSANDREPORT9AcceptanceCriteria9.1Inordertodetermineacceptanceforeachcableconstruction,twotaximumflamepropagationdistancesofthetwosetsofspecimensforacableconstructionhaveadifferencegreaterthan5ft(1.52m),ptanceisnotachievedwiththethreetestlimits,anadditionalsamplelotofthecableconstructionmustbesubmittedforevaluation.a)Theflamepropagationheightofeachsetofcablespecimensshallnotequalorexceed12ft,0in(3m,66cm).b)Thetemperatureofanythermocoupleshallnotexceed850.0°F(454.4°C).UL 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ULFEBRUARY16,2007UL16661310Report10.1Thereportshallinclude,andisnotlimitedto,thefollowingitemsforeachtest:a)Adetaileddescription(construction)ofthetestcable,includingthecablediameter.b)Thenumberofcablelengthsthatconstitutethesetoftestspecimens.c)Themaximumflamepropagationheightobservedroundedtothenearest6in(15cm)istheflamepropagationheightforthesetofcablespecimenstested.d)Themaximumcontinuousdamageheightonthecablespecimensandthekindsofcabledamageasdefinedin8.7.e)Themaximumtemperature(°F)recordedbytheeightthermocouplesinthesecondfloorslot.f)Agraphoftemperature(°F)versustimeofexposure(minutes)oftheeightthermocouplesinthesecondfloorslot.g)Agraphofthefirstfloorslotvelocity(m/s)versustimeofexposure(minutes).GUIDETOMOUNTINGMETHODS11Introduction11.1Thisguideisanaidindeterminingthemethodofmountingvariouscabletypesinthefinotimplyrestrictionsinthespecificdetailsoffieldinstallation.11.2Wherethemethodsdescribedarenotapplicabletoanunusualcableconstruction,otherappropriatemeansofsupportaretobedevised.12Method12.1Theindividualspecimencablelengthsaretobesuspendedfromasupportsystemonthesecondfloorandheldinplacejustbelowthesupportsystemandatthefirst-floorslot.12.2Thesupportframeistoconsistofasteelbarlocatedonthesecondflividualcablelengthsaretobesuspendedfromthesupportframebyoneofthefollowingmethods:a)Thecablesaretobedrapedoverthesupportframe.b)Thecablesaretobearrangedinaclampingdevicethatissuspendedfromthesupportframebytwohooks.c)Inthecaseoflarge-diametercables, COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL14UL1666FEBRUARY16,200712.3ThecablesareviceistoconsistoftwometalC-channesoaseoflarge-diametercables,nailsaretobedriventhrougheachilsaretobedrivenhorizontallythroughthecable,aboveandperpendiculartotheclamp.12.4Thecablesarealsotobeheldinplaceatthefirst-flviceistoconsistofonemetalC-channel,whichissoftheplatearetobesecuredtothewalloftheslotbymeansofthreadedrodsandnuts.12.5Thecablesaretoberestrainedfromlateralmovementduringthetestbypositioningfoursteelwiressupportedhorizontallybehindandadjacenttothecablespecimensatlevelsof1,2,4,and6ft(305,610,1219,and1829mm)abovethefirstflelwiresaretobe18AWGinsizeandaretoextendbetweentwofixed,esaretobe1in(25mm)eistobepermanentlymountedoneachsideofthelayerofcablesandslightlybehindthecablessothattheverticalplanethatistangenttothefrontsurf COPYRIGHTED MATERIAL –NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL